I have an 02 grizzly 660, and I can not keep a charge on the battery. I have replaced it twice now thinking that the first time I just put a cheap battery on but I still get the same problem. My problem is that I can only keep a charge on my battery for about 10 days and then it is completly dead. I have tried to check the fuses to see if I can isolate which one is drawing the battery down but they all give me the same reading. I am not sure what I should be getting as a reading to start with? Has anyone had this problem before or do you have any ideas?

 

Buy a voltmeter.
With bike and key off, probe fuses with voltmeter leads.
List all that are hot with key off.
Check fuse box diagram in owners manual, to see if fuse should be hot.
Pull all plastic.
Trace out circuit on bike frame, visually inspect wiring carefully for chafing, grounding, etc. Remove wiring from frame mount, do a 360 degree visual inspection of wire.
Repair, replace the wiring as needed, using the same gauge wire as original, waterproofing all splices.
Replace plastic.

 

you can peform a parasidic draw test. sounds like a low current drain. disconnet positive cable at the battery, set your d.v.o.m. (digital volt ohm meter) or you can use an analog volt meter. set meter to at least 10amps, connect one lead to battery cable and the other lead to battery positive terminal. (so your meter is set to amps connected from battery to cable. i.e. in sereies) with the key off there should be little to no amp draw. little (.03ma) or so. start pulling fuses until you find the one that is drawing (exp. .5amps) using your schematic trace the affected circuit and you will find a corroded, loose, or weak ground. or if you are not comfortable with the meter and still want to tackle it before you involve a shop. patiently check all grounds, connections, and funtion test all switches lights etc. good luck, electrical can sound confusing but also pretty fun.